NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 423
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-12-29 | 423-423-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-05-20 | 423-859-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2024-01-08 | 423-859-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | ROGERSVL | TN |
| 2023-12-15 | 423-287-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2023-08-22 | 423-249-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | FORK RIDGE | TN |
| 2023-08-22 | 423-513-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | VONORE | TN |
| 2023-08-22 | 423-600-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | APISON | TN |
| 2023-08-22 | 423-659-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | COPPERBSIN | TN |
| 2023-08-22 | 423-678-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ROAN MT | TN |
| 2023-08-22 | 423-703-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | COKERCREEK | TN |
| 2023-08-22 | 423-730-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | RICEVILLE | TN |
| 2023-08-22 | 423-749-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | COLLEGEDL | TN |
| 2023-08-22 | 423-862-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | SPRINGCITY | TN |
| 2023-08-22 | 423-866-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | NIOTA | TN |
| 2023-08-22 | 423-868-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MOSHEIM | TN |
| 2023-08-22 | 423-879-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | GEORGETOWN | TN |
| 2023-08-22 | 423-909-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SO PITTSBG | TN |
| 2023-08-17 | 423-516-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | SULIVNGDNS | TN |
| 2023-08-17 | 423-550-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY | TN |
| 2023-08-17 | 423-726-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MIDWAY SUL | TN |
| 2023-08-17 | 423-932-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | ETOWAH | TN |
| 2023-08-11 | 423-669-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BENTON | TN |
| 2023-08-11 | 423-786-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BLUFF CITY | TN |
| 2023-08-11 | 423-824-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | ERWIN | TN |
| 2023-08-11 | 423-858-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2023-08-11 | 423-858-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | BLOUNTVL | TN |
| 2023-08-10 | 423-373-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | BULLS GAP | TN |
| 2023-08-10 | 423-376-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | MADISONVL | TN |
| 2023-08-10 | 423-379-6XXX | 6000–6999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | TN |
| 2023-08-10 | 423-379-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | TN |
| 2023-08-10 | 423-387-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | BRISTOL | TN |
| 2023-08-10 | 423-395-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2023-08-10 | 423-395-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2023-08-10 | 423-419-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | CUMBERLDGP | TN |
| 2023-08-10 | 423-522-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-522-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-522-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2023-08-10 | 423-527-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | SODDYDAISY | TN |
| 2023-08-10 | 423-576-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2023-08-10 | 423-576-1XXX | 1000–1999 | Assigned | ONVOY, LLC - TN | 525E | ELIZABTHTN | TN |
| 2023-08-10 | 423-674-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | DAYTON | TN |
| 2023-08-10 | 423-766-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2023-08-10 | 423-770-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | CHURCHHILL | TN |
| 2023-08-10 | 423-819-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
| 2023-08-10 | 423-819-5XXX | 5000–5999 | Assigned | ONVOY, LLC - TN | 525E | CLEVELAND | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.